# interpolate2d

Version:

Interpolates z-values based on sample data using a specified method.

## Syntax

z2 = interpolate2d(z1, times)
z2 = interpolate2d(z1, x2, y2)
z2 = interpolate2d(x1, y1, z1, x2, y2)
z2 = interpolate2d(x1, y1, z1, x2, y2, method)
Legacy name: interp2

## z1

Sample z-values. z1 is a real matrix.

## times

Number of times MathScript must interpolate recursively between the given points. Specifically, MathScript adds 2^(times)-1 points between each given set of points. times is an integer.

## x2

X-values at which you want to interpolate z-values. x2 is a row vector or a matrix of real numbers.

## y2

Y-values at which you want to interpolate z-values. If x2 is a row vector, y2 must be a real column vector. If x2 is a matrix, y2 must be a real matrix of the same size as x2 .

## x1

Sample x-values. If you do not specify x1, MathScript sets x1 to the values of 0 ... m- 1 , where [m, n] equals size( z1 ). x1 is a real vector.

Name Description
'cubic'

Performs cubic Hermite interpolation.

'linear'

Performs linear interpolation.

'nearest'

Chooses the z1 value corresponding to the (x1, y1) value that is nearest to the current z2 value. MathScript sets the interpolated value to the nearest data point.

'spline'

Performs spline interpolation.

Default: 'linear'

## y1

Sample y-values. If you do not specify y1, MathScript sets y1 to the values of 0 ... n- 1 , where [m, n] equals size( z1 ). y1 is a real vector.

## method

Interpolation method to use. method is a string that accepts the following values:

Name Description
'cubic'

Performs cubic Hermite interpolation.

'linear'

Performs linear interpolation.

'nearest'

Chooses the z1 value corresponding to the ( x1, y1 ) value that is nearest to the current z2 value. MathScript sets the interpolated value to the nearest data point.

'spline'

Performs spline interpolation.

Default: 'linear'

## z2

z-values interpolated at the values of ( x2 , y2 ). z2 is a real matrix.

Z1	= zeros(10, 10);
for i = 1:10
for k = 1:10
Z1(i, k) = i^2+4*i+3*k^4-2*k;
end
end
Z2 = interpolate2d(Z1, 2);

Where This Node Can Run:

Desktop OS: Windows

FPGA: This product does not support FPGA devices